<?php
/**
 * This code is licensed under the BSD 3-Clause License.
 *
 * Copyright (c) 2017, Maks Rafalko
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * * Neither the name of the copyright holder nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

declare(strict_types=1);

namespace Infection\Differ;

use Infection\Logger\GitHub\GitDiffFileProvider;

/**
 * @internal
 * @final
 */
class FilesDiffChangedLines
{
    /** @var array<string, ChangedLinesRange[]> */
    private ?array $memoizedFilesChangedLinesMap = null;

    public function __construct(
        private readonly DiffChangedLinesParser $diffChangedLinesParser,
        private readonly GitDiffFileProvider $diffFileProvider,
    ) {
    }

    public function contains(string $fileRealPath, int $mutationStartLine, int $mutationEndLine, ?string $gitDiffBase): bool
    {
        $this->memoizedFilesChangedLinesMap ??= $this->diffChangedLinesParser->parse(
            $this->diffFileProvider->provideWithLines($gitDiffBase ?? $this->diffFileProvider->provideDefaultBase()),
        );

        foreach ($this->memoizedFilesChangedLinesMap[$fileRealPath] ?? [] as $changedLinesRange) {
            if ($mutationEndLine >= $changedLinesRange->getStartLine() && $mutationStartLine <= $changedLinesRange->getEndLine()) {
                return true;
            }
        }

        return false;
    }
}
